import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

// NProgress:小进度条插件
NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login', '/auth-redirect'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      // 决定该用户是否通过getInfo获得了其权限
      const hasRoles = store.getters.roles && store.getters.roles.length > 0
      if (hasRoles) {
        next()
      } else {
        try {
          // 获得用户信息
          // 用户必须是一个对象列表，比如['admin']或者['admin','editor']
          const { roles } = await store.dispatch('user/getInfo')

          // 基于角色生成可访问路由
          const accessRoutes = await store.dispatch('permission/generateRoutes', roles)
          // alert(1)

          // 动态添加可访问路由(添加到系统路由中)
          router.addRoutes(accessRoutes)

          // hack method to ensure that addRoutes is complete
          next({ ...to, replace: true })
        } catch (error) {
          // 移除token并回到登录界面重新登录
          await store.dispatch('user/resetToken')
          // Message是Element-ui中的通知信息框
          // Message.error(error || 'Has Error')
          Message.error({
            message: error || 'Has Error'
          })
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
      // const hasGetUserInfo = store.getters.name
      // if (hasGetUserInfo) {
      //   next()
      // } else {
      //   try {
      //     // get user info
      //     await store.dispatch('user/getInfo')
      //
      //     next()
      //   } catch (error) {
      //     // remove token and go to login page to re-login
      //     await store.dispatch('user/resetToken')
      //     Message.error(error || 'Has Error')
      //     next(`/login?redirect=${to.path}`)
      //     NProgress.done()
      //   }
      // }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
